I have a code of U1064

Tiny
FAW484
  • MEMBER
  • 2003 CHEVROLET IMPALA
  • 92,000 MILES
I have a code of U1064 ( Loss of Communication) Can you tell me what exactually this means. And how to fix it? I ve read that alot of BCM, s have been replaced needlessly. My security light is on. And also I have a code of B3128 and my door lock fuse keeps blowing.
Thursday, March 22nd, 2012 AT 2:47 PM

2 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
The U1064 indicates a communication error between the BCM and the PCM which would have to be investigated further.

The B3128 is a problem in the door lock circuit somewhere

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to voltage on the door lock actuator lock control circuit, door lock actuator unlock control circuit or driver door lock actuator unlock control circuit for greater than 150 milliseconds.
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Thursday, March 22nd, 2012 AT 3:35 PM
Tiny
FIXITMR
  • MECHANIC
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Check the connector plug seems to be a common issue.
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Thursday, March 22nd, 2012 AT 3:45 PM

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